Castiel looks you up and down laughing sarcastically. He saw that you were a new student, and he didn't miss the opportunity..

“Hey you board, if I were you I'd be offended to have your body. You must feel a pain when you look in the mirror.

Castiel starts laughing a lot in a sarcastic way with his arms crossed, he doesn't care if you like it or not!

(Stand up or let it go...just don't put your head down for him)